Author Question: Results from which two procedures complement each other in the preoperative evaluation of the ... (Read 13 times)

karlynnae · **on:** Jun 25, 2018

Results from which two procedures complement each other in the preoperative evaluation of the carotid arteries?

a. Ultrasound Doppler and magnetic resonance angiography
b. Conventional angiography and evoked potential
c. CT and magnetic resonance angiography
d. Transcranial Doppler and extracranial Doppler

Question 2

Which of the following statements are true regarding rotational therapy? (Select all that apply.)

a. Continuous lateral rotation therapy (CLRT) can be effective for improving oxygenation if used for at least 18 hours/day.
b. Kinetic therapy can decrease the incidence of ventilator-acquired pneumonia in neurologic and postoperative patients.
c. Use of rotational therapy eliminates the need for other pressure ulcer prevention strategies.
d. CLRT helps avoid hemodynamic instability secondary to the continuous, gentle turning of the patient.
e. CLRT has minimal pulmonary benefits for critically ill patients.

upturnedfurball · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

A
Magnetic resonance angiography of the carotid arteries has become an established complement to preoperative ultrasound evaluation. It helps determine the area of salvageable tissue (or penumbra) after acute stroke and head injury.

Answer to Question 2

A, B, E
Studies have found that to achieve benefits with CLRT or kinetic therapy, rotation must be aggressive, and the patient must be at least 40 degrees per side, with a total arc of at least 80 degrees for at least 18 hours a day. Kinetic therapy has been shown to decrease the incidence of ventilator-acquired pneumonia, particularly in neurologic and postoperative patients. Complications of the procedure include dislodgment or obstruction of tubes, drains, and lines; hemodynamic instability; and pressure ulcers. Lateral rotation does not replace manual repositioning to prevent pressure ulcers. CLRT has been shown to be of minimal pulmonary benefit for the critically ill patients.